str = ["  hello  ", " world ", "python"]

for i in range(len(str)):
    str[i] = str[i].strip()
    str[i] = '  ' + str[i] + '\n'

print(str)

str = ["  hello  ", " world  本章未完12章3124", "python"]

for i in range(len(str)):
    s_cleaned = str[i].split("章")
    print(s_cleaned)
    # print(len(str[i].split("本章未完")))
    # str[i] = s_cleaned

print(str)

for i in range(2, 5 + 1):
    print(i)
